2009-3525 | Linux Foundation Xen grub.conf access control (Bug 525740# / BID-36523)
|CVSS Meta Temp Score
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|CTI Interest Score
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A vulnerability classified as critical was found in Linux Foundation Xen 3.0.3/3.3.0/3.3.1 (Virtualization Software). This vulnerability affects an unknown code block of the file grub.conf. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability.
The weakness was released 10/05/2009 by Jan Lieskovsky as Bug 525740# as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability was named CVE-2009-3525 since 10/01/2009. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/23/2021). The MITRE ATT&CK project declares the attack technique as T1068.
The vulnerability scanner Nessus provides a plugin with the ID 67935 (Oracle Linux 5 : xen (ELSA-2009-1472)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165223 (SUSE Security Update for Multiple Packages (SUSE-SR:2010:012)).
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 8.4
NVD Base Score: 🔍
Status: Not defined
0-Day Time: 🔍
09/25/2009 +0 days 🔍
10/01/2009 +5 days 🔍
10/05/2009 +4 days 🔍
10/05/2009 +0 days 🔍
10/05/2009 +0 days 🔍
07/12/2013 +1376 days 🔍
03/18/2015 +614 days 🔍
08/23/2021 +2350 days 🔍Vendor: https://www.linuxfoundation.org/
Vulnerability Center: 23607 – Xen 3.0.3, 3.3 and 3.3.1 Pygrub Bootloader Local Authentication Bypass Vulnerability, Medium
SecurityFocus: 36523 – Xen pygrub Local Authentication Bypass Vulnerability
See also: 🔍
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